不同来流流速和布设间距下人工鱼礁组合的流场效应研究  

Effect of artificial reef assemblage with different inflow velocitiesand layout spacings on flow field

作　　者：邵鹏飞 贾瑞 万宇[2] 张帅帅 SHAO Pengfei;JIA Rui;WAN Yu;ZHANG Shuaishuai(Yangtze River Yichang Waterway Engineering Bureau,Yichang 443000,China;National Inland Waterway Regulation Engineering Research Center,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Shipping Engineering Survey and Design Institute of the Yangtze River,Chongqing 401147,China)

机构地区：[1]长江宜昌航道工程局,湖北宜昌443000 [2]重庆交通大学,国家内河航道整治工程技术研究中心,重庆400074 [3]长江重庆航运工程勘察设计院,重庆401147

出　　处：《水运工程》2024年第12期97-104,110,共9页Port & Waterway Engineering

基　　金：国家自然科学基金项目(52279058);长江航道局科研项目(KY2022-01、YG04-CF-QT-2021024)。

摘　　要：人工鱼礁的投放可改善河流局部水域的生态环境,为鱼类等水生生物营造良好的栖息环境。基于计算流体力学(CFD)方法,研究长江上游三棱柱人工鱼礁组合的水动力特性,并以上升流和背涡流的几何特征为参数,分析不同来流流速(1.5、2.4和3.0 m/s)和布设间距(0.5、1.5和2.5 m)对流场效应的影响。结果表明:随着来流流速的增加,在相同人工鱼礁组合工况下上升流和背涡流的几何特征值变化不大;随着布设间距的增加,相同人工鱼礁组合工况下上升流、背涡流最大高度和体积等几何特征值先增加后减小,1.5 m为最优布设间距;而在同一流速或布设间距下,随着人工鱼礁组合数量的增加,上升流、背涡流最大高度和体积逐渐增加,7个为1组的人工鱼礁为最优组合。The deployment of artificial reefs can improve the ecological environment of local water areas in rivers,creating a favorable habitat for aquatic organisms such as fish.Based on the computational fluid dynamics(CFD)method,we study the hydrodynamic characteristics of a combination of triangular prism artificial reefs in the upper reaches of the Yangtze River.Using the geometric features of upwelling and back-eddy flows as parameters,we analyze effect of different inflow velocities(1.5 m s,2.4 m s,and 3.0 m s)and layout spacings(0.5 m,1.5 m,and 2.5 m)on the flow field.The results show that with an increase in inflow velocity,the geometric characteristics of upwelling and back-eddy flow show minimal variation under the same artificial reef combination condition.As the layout spacing increases,the geometric characteristics such as the maximum height and volume of upwelling and back-eddy flow initially increase and then decrease under the same artificial reef combination condition,with 1.5 m being the optimal deployment spacing.Additionally,under the same flow velocity or layout spacing,an increase in the number of artificial reef combinations leads to a gradual increase in the maximum height and volume of upwelling and back-eddy flow,with a configuration of seven reefs as the optimal combination.

关 键 词：长江上游 三棱柱人工鱼礁组合 上升流 背涡流 数值模拟 

分 类 号：S953.1[农业科学—水产养殖] U612.3[农业科学—水产科学]